/**   
 * @Title: EncryptUtils.java 
 * @Package com.hundsun.hitop.base.utils 
 * @Description: TODO(用一句话描述该文件做什么) 
 * @author zjhua@hundsun.com   
 * @date 2016年6月28日 下午7:57:30 
 * @version V1.0   
 */
package com.medsoft.base.utils;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * @author zjhua
 *
 */
public class EncryptUtils {
	/*
	 * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式，key需要为16位。
	 */
	private static String sKey = "drpcpqq860916256";
	private static String ivParameter = "abcdef0123456789";

	// 加密
	public static String aesEncrypt(String sSrc) throws Exception {
		Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
		byte[] raw = sKey.getBytes();
		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// 使用CBC模式，需要一个向量iv，可增加加密算法的强度
		cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
		byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
		return new BASE64Encoder().encode(encrypted);// 此处使用BASE64做转码。
	}

	// 解密
	public static String aesDecrypt(String sSrc) throws Exception {
		try {
			byte[] raw = sKey.getBytes("ASCII");
			SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
			cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
			byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密
			byte[] original = cipher.doFinal(encrypted1);
			String originalString = new String(original, "utf-8");
			return originalString;
		} catch (Exception ex) {
			return null;
		}
	}

	public static void main(String args[]) {
		// 需要加密的字串
		String cSrc = "ceshi123";
		System.out.println(cSrc);
		// 加密
		long lStart = System.currentTimeMillis();
		String enString = "";
		long lUseTime;
		try {
			enString = EncryptUtils.aesEncrypt(cSrc);
			System.out.println("加密后的字串是：" + enString);

			lUseTime = System.currentTimeMillis() - lStart;
			System.out.println("加密耗时：" + lUseTime + "毫秒");
		} catch (Exception e1) {
			e1.printStackTrace();
		}

		// 解密
		lStart = System.currentTimeMillis();
		String DeString;
		try {
			DeString = EncryptUtils.aesDecrypt(enString);
			System.out.println("解密后的字串是：" + DeString);
			lUseTime = System.currentTimeMillis() - lStart;
			System.out.println("解密耗时：" + lUseTime + "毫秒");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
